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Which equation has the solution 
x=6 ?

2x+9=-21

4x-6=18

5x+3=19

5x+9=64

Which equation has the solution x=6 x=6 ?\newline2x+9=21 2 x+9=-21 \newline4x6=18 4 x-6=18 \newline5x+3=19 5 x+3=19 \newline5x+9=64 5 x+9=64

Full solution

Q. Which equation has the solution x=6 x=6 ?\newline2x+9=21 2 x+9=-21 \newline4x6=18 4 x-6=18 \newline5x+3=19 5 x+3=19 \newline5x+9=64 5 x+9=64
  1. Identify Equation: We need to find which equation has the solution x=6x=6. To do this, we will substitute x=6x=6 into each equation and see which one holds true.
  2. Equation 11 Substitution: Substitute x=6x=6 into the first equation: 2x+9=212x+9=-21.\newlineCalculation: 2(6)+9=12+9=212(6)+9 = 12+9 = 21.\newlineCheck if 2121 equals 21-21.\newline2121 is not equal to 21-21.
  3. Equation 22 Substitution: Substitute x=6x=6 into the second equation: 4x6=184x-6=18.\newlineCalculation: 4(6)6=246=184(6)-6 = 24-6 = 18.\newlineCheck if 1818 equals 1818.\newline1818 is equal to 1818, so this equation could be the correct one.
  4. Equation 33 Substitution: Substitute x=6x=6 into the third equation: 5x+3=195x+3=19.\newlineCalculation: 5(6)+3=30+3=335(6)+3 = 30+3 = 33.\newlineCheck if 3333 equals 1919.\newline3333 is not equal to 1919.
  5. Equation 44 Substitution: Substitute x=6x=6 into the fourth equation: 5x+9=645x+9=64.\newlineCalculation: 5(6)+9=30+9=395(6)+9 = 30+9 = 39.\newlineCheck if 3939 equals 6464.\newline3939 is not equal to 6464.

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